Lead-pencil



W. W'. MOORE. LEAD PENCIL.

APPLICATION FILED DEC. I. 1919.

Patented Feb. 22, 1921 2 SHEETS-SHEET I.

Indenor .mill

\ f IIIII w. w. MOORE.

LEAD PENCIL. APPL'ICATION FILED DEC. l. 1919.

' Patented Feb. 22', 1921.

2 SHEETS-SHEET 2- w MiN l A ny.

, ication.

UNITED STATES PATENT OFFICE.

WADE W. MOORE, OF '.PITTSBURG, CALIFORNIA, ASSIGNOR TO JESSE E. ROACH, 0F

OAKLAND, CALIFORNIA.

LEAD-PENCIL.

Specification of Letters Patent. Patented Feb. 22, 1921.

Application led December 1, 1919. Serial No. 342,022.

To all whom it may concern:

Be it known that I, WADE W. Moonn, a citizen of the United States, residing in the city of Pittsburg, in the county of Contra Costa and State of California, have invented a certain new and useful Improvement in Lead- Pencils, of which the following is a speci- My invention relates to vimprovements in lead pencils ofthe type wherein a permanent body is supplied with eXtra leads and from which individual leads are projected from the writing point or end of the pencil by suitable mechanism.

The primary object of the present invention is to provlde a new and improved pencil ,of the character described having few parts of simple construction, which shall be easily .and readily operated.

It is also an obj eet of the present invention to provide a new and improved constructionwhich shall 'be economical and possessed of a maximum efficiency and strength.

A furtherobject is to provide a pencil Qf the type specified wherein the mechanical parts may l be quickly operated `to renew a lead andproject the same from the pencil.

A still further object is to provide new and improved means for normally preventing a movement of the lead within the writing` point to prevent accidental or inadvertent removal of the lead from the pencil.

Other objects will hereinafter more fully appear.

I accomplish these several objects by means of the improved device disclosed in the drawings forming a part of the present specification wherein like characters of reference are used to designate similar arts throughout the said specification and rawings, and in which Figure 1 is a broken viewof m improved pencil partly in longitudinal section;

Fig. 2 is an enlarged transverse sectional view taken on line 2--2 of Fig. 1 in the direction indicated;

Fig. 3 is an enlarged transverse sectional view taken on line 3-3 of Fig. 1 in the direction indicated;

Fig. 4 is an enlarged transverse sectional view taken on line 4-4 of Fig. 1 in the direction indicated;

Fig. 5 is an enlarged broken view of the magazine and follower removed from lthe pencil and shown partly in .vertical section;-

Fig. 6 is an enlarged view of the hollow core and lead retaining means; and

Fig. 7 is an enlarged transverse sectional View taken on line 7--7 of Fig. 6 in the direction indicated. Referring tothe drawings the numeral 1 1s used to designate a shell having a plurality of longitudinally disposed grooves 2 on the inner surface thereof and an internal or-female thread 3 in one end thereof which is en aged by a male thread on a hollow tapere end 4 provided with an axial bore 6, said 4tapered end .4 forming a continuation of the shell 1.

n By means of this novel arrangement a simple and effective barrel or pencil is simply and economically provided. The tapered end may be easily and cheaply produced on a standard screw machine and the shell 1 ma be produced of standard tubing. Thls arrangement eliminates the expensive method of drawing a tapered `tube from sheet metal and the longitudinally disposed ribs 2 provide a strengthening means to impart strength to said shell, and also to slidably engage a follower in a manner hereinafter more fully described.

A threaded magazine 7 is arranged to con tain extra leads 8 for the pencil and is provided with an exterior thread 9 of comparatively large-pitch, the purpose of which will 'hereinafter e more fully set forth, and a threaded collar 11 immovably mounted on the inner end of the magazine of normal or standard pitch to engage the female thread of the tapered end 4, whereby said magazine 7 ma be rotatably mounted within the penci The magazine 7 is also provided with agagement with the longitudinal grooves 2 of the shell 1, and said collar is likewise provided with an internal annular groove 19 which is slidably enga ed by an arcuate member 21 on the end o a lateral extension 22 of a longitudinally disposed plunger 23 slidably mounted within the radial groove 12 of the magazine 7, the free end of said plunger 23 being positioned between .the filler 14 andthe back of the groove 12 as disclosed in Fig. 1 of the drawings.

The end of-the magazine 7 is also provided with a standard thread 26 to4 receive a closin cap 24 having a tubular extension 28to allne the free end of the plunger 23 with the reduced portion 29, open on one side thereof, of a core 31 mounted within the tapered end 4. A spring clamp 32 is clamped upon the reduced portion 29 of the core 31 and extends into said opening to frictionally engage the lead 8 therein to normallyl prevent movement of said lead within the reduced ortion 29.

The upper end o the magazine 7 is provided with an ornamental head or knob 33 extending exteriorly of the shell 1 whereby said magazine 7 may be rotated to operate the follower 16 and the plunger 23. The ornamental head 33 inclosing an eraser element 35 is fully disclosed and described in lapplicants co-pending application, Serial o. 342,021, reference to which is hereby made. 'Y

In operation a lead 8 is dropped into the shell 1, with the members 7, 16, and 23 removed and the magazine 7 with the follower 16 and plunger 23 positioned therein is then inserted in the shell 1 the follower 16 being then adjacent the knob or head 33.

' Insertion of the magazine and engagement of the ribs 18 with the grooves 2 of the shell 1 is easily and readily accomplished by reason of the plurality of said ribs and grooves, as it is not necessary that any particular rib should engage any particular groove. A slight clock-wise rotation of the head or nob 33 will rotate the magazine 7 and cause the threads of the collar 11 to engage the female threads of the tapered end 4 thereby instantly. and lrotatably connectin or securing the magazine 7 within the shel 1. As the knob 33 is rotated the follower 16 is moved' lon 'tudinally upon the magazine 7 and wit in the shell 1. Rotation of the Ifollower 16 is'prevented by the slidable engagement of the ribs 18 of the collar 17, on the said following `16, with the longitudinally disosed -grooves 2 of the shell l. As the folower 16 is moved longitudinally Within said shelll the annular groove' 19 of said collar 17 slidabl engages the arcuate member 2l on the ateral extension 22 tof the plunger 23 within the radial groove 12 of the magazine 7 and thereby moves said V plunger 23 agamst the lead `8 within the -reuce portion 29 of the core 31 whereby said lead 8 mayl be. projected from the writing point of the pencil or the axial bore 6 of the tapered end 4. The relatively greater pitch of the thread 9 causes the follower 16 to bev 'advanced a greater distance with' each revolution of the magazine 7 than the magazine itself is advanced by engagement of the collar 11 with the internal threads of the tip 4. The relative pitch of the two threads is such as to cause the magazine 7 and the follower 16 to be advanced to the extreme positions simultaneously.

The lead 8, being frictionally engaged by the clamp 32, is held within its projected position until broken or worn by usage when siderable pressure is brought to bear against said lead 8 s'o that the same is firmly held within'the pencil and cannot become lost or inadvertently move out of the pencil.

When a new lead is to be inserted a slight.

rotation of the knob 33 in a contra-clock-wise direction will move the follower 16 and plunger 23 operatively' connected thereto toward said knob 33 'and simultaneously disengage or unscrew the threaded collar 11 from the female thread of the tapered end 4, thereby permitting a quick and ready withdrawal of the magazine from the shell 1.

The cap 24 is then removed from the inner end of the magazine 7 and a new lead taken from said magazine and inserted within the shell 1 as hereinbefore described. The cap 24is then replaced and the magazine 7 is then replaced within and operatively connected to the shell 1.

From the foregoing it is obvious that I have rovided a new and improved construction or lead pencils wherein a simple, effective and economical structure is obtained having a maximum efficiency. It is also evident that the plurality of ribs 18 and the grooves 2 of the shell 1 provide a new and novel construction whereby slidable engagement of the follower 16 within the shell 1 is easily and quickly obtained.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a lead pencil, the combination of a shell having a plurality of grooves Von the inner surface thereof;` a threaded magazine rotatably connected at its inner end with the shell and having a longitudinally disposedradial groove therein; a threaded follower screwed upon the magazine and adapted for slidable engagement with the grooves of the shell to prevent rotation of said follower; and a plunger mounted within the longitudinally disposed radial groove of the magazine and operatively connected to the ,follower whereby said plunger 'may be at its inner end with the interior of the shell; a threaded follower screwed upon the magazine and having longitudinally dis-- posed corrugationsvthereon to engage the internally grooved shell to prevent--rotation of said follower; and a plungler mounted for longitudinal movement wit in the shell and operatively connected to the follower whereby rotation of the magazine will move said follower and plunger longitudinally within the pencil.

3. In a lead pencil, the combination of a shell grooved internally; an exteriorly threaded magazine adapted for engagement at its inner end with the interior of the shell; a threaded follower screwed upon the magazine and having longitudinally disosed corrugations thereon to engage the internally grooved shell to prevent rotation of said follower; a plunger mounted for longitudinal movement within the shell and operatively connected to the follower whereby rotation of the ma azine will move said follower and plunger on'gitudinally within the pencil; and meansl for rotating the magazine within the shell.

4. In a lead pencil, the combination of a shell having a plurality of longitudinal grooves on the inner surface thereof; a threaded magazine rotatably mounted within the shell; a follower screw-threaded upon themagazine and adapted Yfor slidable engagement with the grooves of the shell and having an internal annular groove therein; and a plunger mounted for longitudinal movement within the shell and having a lateral extension slidably engaging the an# nular groove within the fol ower whereb rotation of the magazine will move the fo lower and plunger longitudinally within the pencil. v

5. In a lead pencil, the combination of a shell having a plurality of longitudinally disposed grooves on the inner surface thereof; a threaded magazine rotatably connected at itsinner end within the shell and having a longitudinally disposed radial groove formed therein; a follower screw-threaded upon the magazine and having a plurality of longitudinally disposed ribs to slidably engage the grooves of the shell and also provided with an internal annular groove; and a plunger mounted within the radial groove of the magazine' and having a lateral extension slidably engaging the annular groove of the follower whereby said plunger may be moved longitudinally with the follower when the magazine is rotated.

6. In a lead pencil, the combination of a shell having longitudinally disposed grooves on .the inner surface thereof; a hollow tapered end screw-threaded to the shell and.l

having an axial bore therein and forming a continuation of said shell; a threaded magazine having its inner end adapted for .rotatable engagement with the inner end of the tapered end; a follower screwed upon the magazine and adapted for slidable engagement with the groovesv of the shell, whereby said follower may be moved longltudinally within the pencil when the magazine is rotated therein; and a plunger operatively connected to the follower and adapted to move a lead longitudinally through the tapered end when the magazine is rotated.

7 In a lead pencil, the combination of a shell having longitudinally disposed grooves on the inner surface thereof; a hollow tapered end screw-threaded to the shell and Vt'ionally engaging the lead to normally prevent movement thereof.

8. In a lead.pencil, the combination of a Shell having longitudlnally disposed grooves on the inner surface thereof; a hollow tapered end rigidly connected to one end of the shell 4and forming ,a continuation therelof and provided with an axial bore; ,ay

threaded magazine adapted at its inner end for rotatable engagement with the inner end of the tapered end and having a longitudinally disposed radial groove formed therein; a follower screwed upon the magazine and having an internal annular groove formed therein and provided with longitudinally disposed ribs to slidably engage the grooves of the shell to prevent rotation of and thereby move said follower lon- 1gituinally when the magazine is rotated;

and a p unger mounted within the groove of the magazine and having a lateral extension slidably engaging the annular groove within the follower to move said plunger longitudinally against a llead in the bore 'of the tapered end.

9. In a lead pencil, the combination of a shell having longitudinally disposed grooves on the inner surface thereof; a hollow tapered end rigidly connected to one end of the shell and forming a continuation 'thereof and provided with an axial bore;

a threaded magazine adapted at its inner end for rotatable engagement w1th the 1nner end of the tapered end and having .a longitudinally disposed radial groo-ve formed therein; a follower screwed upon the magazine and having an internal annular groove formed therein and provided with longitudinally disposed ribs to slidably'engage the grooves of the shell to prevent rotation of and thereby move said follower longitudinally when the magazine is rotated; a plunger mounted within the groove of the magazine and having a lateral extension slidably engaging the annular groove within the follower to move said p-lunger longitudinally against a lead inthe bore of the tapered end; and means for frictionally engaging said lead to normally prevent movement thereof within said bore.

10. In a lead pencil,the combination of a shell grooved longitudinally on the inner surface thereof.;'a hollow tapered end conpencil and bore of the tapered end when the magazine is rotated.

11. In a lead pencil, the combination of a shell grooved longitudinally on the inner surface thereof; a hollow tapered end connected to one end of the shell to form a continuation thereof and having an axial bore therein; a threaded magazine mounted within the shell and adapted to rotatably engage the tapered end,a follower screwed upon the magazine and vslidably engaging the longitudinal grooves in the shell to prevent rotation of said follower; a plunger operatively connected to the follower and adapted to be actuated by said follower to move a lead longitudinally through the pencil and bore of the ta ered end when the magazine is rotated; an means for frictionally engaging said lead to normally prevent movement thereof through said bore. j

12. In a lead pencil, the combination of al shell grooved longitudinally on the inner surface thereof; a hollow tapered end connected toone end of the shell to form a continuation thereof and having an axial bore therein; a threaded magazine mounted within the shell and adapted to rotatably engage the tapered end, a follower screwed upon the magazine and slidably engaging the longitudinal grooves in the shell to prevent rotation of said follower; a plunger operatively connected to the follower and adapted to be actuated by said follower to move a lead longitudinally through the pencil and bore and tapered end when the magazine is rotated; means for frictionally engaging said lead to normally prevent movement thereof through said bore; and a guide secured to the end of the magazine and adapted to retain the free end of the plunger coaxial with/ the pencil and to close the.

magazine.

13. In a lead pencil, the `combination of a shell having a plurality of longitudinally disposed grooves in the inner surface thereof; a hollow taperedend mounted upon one end of the shell and forming a continuation thereof, said tapered end having an axial bore; and an internal thread.. therein.; ar

magazine and operatively connected with the follower and adapted to be moved by said follower when the magazine is rotated to move a lead longitudinally through said bore of said tapered end.

14:. In a lead pencil; the combination of a shell having av plurality of longitudinally disposed grooves in the inner surface thereof; a hollow tapered end mounted upon one end of the shell and forming a continuation thereof; said tapered end having an axial bore and an internal thread therein; a magazine arranged to contain extra leads for thepencil and having one thread arranged thereon of comparatively large litch and a smaller normally -pitched threa to engage the internal thread in the hollow tapered end, and provided with a longitudinally disposed radial groove; a follower screwed upon the magazine `thread of larger pitch and arranged for slidable en agement with the grooves of the shell; a p unger mounted within the radial groove of the magazine and operatively connected with the follower and adapted to be moved by saidV follower when the magazine is rotated` to a lead longitudinally -through said bore of said tapered end; and means mounted within the hollow tapered end for frictionally engaging said lead to normally prevent movement thereof.

- 15. In a lead pencil, the combination of a shell having a yplurality of longitudinally disposed grooves on the inner surface thereof; a. hollow tapered end mounted upon one end of the shell and forming a continuation thereof, said.tapered end having an axial bore and an internal thread therein; a magazine arranged to contain extra leads l shell having a p urality of for the pencil and having one thread thereon of comparatively large pitch and a smaller normally pitched thread to engage the internal thread in the hollow end, and provided with a longitudinally disposed radial groove; a follower screwed upon the magazine thread ofI larger pitch and arranged for slidable engagement with the grooves of the shell; a plunger mounted within the radial groove of the magazine and operatively connected with the follower and adapted to be moved by said follower when the magazine is rotated to move a lead longitudinally through said bore of saidtapered end; a hollow core mounted within the tapered end and having a reduced cylindrical portionopen on one side thereof; and a spring clamp mounted uponsaid reduced portion and adapted to extendthrouh'said opening and frictionally yengage a lea thereon to normall prevent movement of said lead within sald reduced portion.

p 16. Inpa lead pencil,.the combination of a she'll having a plurality of grooves on the inner surface thereof; a hollow tapered end secured to one end of the shell and having an internal thread and yan axial bore; a

threaded magazine mounted tvithinthel shelland having a longitudinally disposed radial groove formedtherein; a follower screwed upon the magazine and arranged to slidably engage the vgrooves 'within the shell; a plun.

ger mounted within the radial groove of the magazine and operatively connected to the follower whereby said plunger may be actuated to move a lead longitudinally through the axial bore of the tapered end when the `magazine is rotated; and a guide detachably connected to the open end of the magazine and adapted to engage the free end of the plunger and retain the same in alinement with the axial bore of the tapered end and to engage the internalthread of the tapered end tp] `ilalitatably retain the magazine within the s e n 17. In a lead en'cil, the combination of a ooves on the inner surface thereof; a ho low tapered end secured to one end of the shell and having an internal thread and an axial bore; a threaded magazlne mounted within the shell and having a longitudinally disposed radial groove f formedk therein; a follower screwed upon the magazine and arranged to slidably engage the grooves within the shell; a plunger.

mounted within the -radial groove of the magazlne and operatively connected tothe y the axial bore of the-tapered/end and to engage the internal thread of the tapered end to rotatably retain the magazine within the shell; and means mounted within the hollow tapered end and arranged to frictionally enga' e a lead in the bore of said end to norma ly prevent movement of said lead within said bore. v

18. In a lead pencil, the combination of a shell having a plurality of grooves on the inner surface thereof; a hollow tapered end secured to one end of the shell andhaving an internal thread and an axial bore; a threaded magazine mounted within the shell and having a longitudinally disposed radial groove formedtherein; a follower screwed upon the magazine and arranged to slidably engage the grooves within the shell; a plunger mounted within the radial groove'of the magazine and operatively connected to the follower whereby said plunger may be actuated to move a -lead longitudinally through the axial bore of the tapered end when the magazine is rotated; a guide detachably connected to the open end of the magazine and adapted to engage the free end of the plunger and retain the same in alinement with mounted' upon said reduced end and exten ing'into the open portion of saidcyllndrlcal e portion'to frictionally engage a lead therein to normally prevent movement of .said lead within said bore.

In witness whereof I hereunto set my signature. I

WADE w. MooRE. 

